Memory2 x DIMM, Max. 16GB, DDR3 1333/1066 Hz Non-ECC, Un-buffered MemoryDual Channel Memory ArchitectureSupports Intel Extreme Memory Profile (XMP)* The maximum 16GB memory capacity can be supported with 8GB or above DIMMs. ASUS will update the memory QVL once the DIMMs are available in the market.* Due to OS limitation, when installing total memory of 4GB capacity or more, Windows 32-bit operation system may only recognize less than 3GB. Install a 64-bit Windows OS when you want to install 4GB or more memory on the motherboard.